6.4.1 Outline the role of the computers used in the separate type of networks: WAN, LAN and the Internet.
The roles of providers, servers and clients should be understood for
each of these networks. Students should be able to select the
appropriate type of network for a given situation. They must
understand the role of gateways.
6.4.2 Describe the features of communications needed for networking.
Ethernet, public and private telephone lines, ISDN, ADSL, fibre
optic and wireless methods should all be familiar and students should
be able to select the most suitable method of communication in a
given situation, and to state the advantages of each method.
Technical details will not be required.
6.4.3 Describe packet switching.
Students need to be aware that when a message is dissembled into
packets, the packets may take different paths and pass through
different nodes to arrive at the same destination, and that packets can be discarded. Virtual circuits are not required.
6.4.4 Outline the need for protocols in packet switching.
Students do not need to know technical details of TCP, IP, OSI, but
must understand that protocols include essential information that
allows packets to be reassembled at their destination according to the requirements of the receiving computer.
6.4.5 Explain the need for network security and describe how this can be achieved.
Emphasize the importance of protection within a LAN by giving layered access (for example, via permissions on certain areas) to
different users, and marking files as read only. The need for a firewall to prevent intrusion from outside should be clear.
Networked Computer System on Prezi
6.4.1 Outline the role of the computers used in the separate type of networks: WAN, LAN and the Internet.
The roles of providers, servers and clients should be understood foreach of these networks. Students should be able to select the
appropriate type of network for a given situation. They must
understand the role of gateways.
6.4.2 Describe the features of communications needed for networking.
Ethernet, public and private telephone lines, ISDN, ADSL, fibreoptic and wireless methods should all be familiar and students should
be able to select the most suitable method of communication in a
given situation, and to state the advantages of each method.
Technical details will not be required.
6.4.3 Describe packet switching.
Students need to be aware that when a message is dissembled intopackets, the packets may take different paths and pass through
different nodes to arrive at the same destination, and that packets can be discarded. Virtual circuits are not required.
6.4.4 Outline the need for protocols in packet switching.
Students do not need to know technical details of TCP, IP, OSI, butmust understand that protocols include essential information that
allows packets to be reassembled at their destination according to the requirements of the receiving computer.
6.4.5 Explain the need for network security and describe how this can be achieved.
Emphasize the importance of protection within a LAN by giving layered access (for example, via permissions on certain areas) todifferent users, and marking files as read only. The need for a firewall to prevent intrusion from outside should be clear.
http://en.wikipedia.org/wiki/List_of_Advanced_Level_subjects
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